Drilling-machine



Patented Apr.. 26g 19M.

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W. C. DYER. DRLUNG MACHINE. Amm-mon mgn 1m23.191s.

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WALTER C. DYER, OF CHCiG-O, ELLEN 01S, ASSGNOR TG THE BUDA COMPANY, A CBPORATION F LLNOIS.

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Application led January 23, 1913.

To all fio lio/m it may @officer/n Be it known that l, llViiLTnn C. Drniz, a citizen of the ll'nited States, residing` at Chicago, county of Cook, and State of Illinois have invented certain new and useful improvements in llrilling-lvfachines, of which the following is a specification.

This invention relates in general to drilling apparatus, and is an improvement upon that type of drill adapted for drilling bond wire or other holes in railroad rails, such as described in the United States Letters Patent to llace and Jenkins No. 1,175,556, and to myself, No. 1,221,708, of April 3, 191'?.

lily invention has for one of its primary objects the provision of novel ineans for clamping the drill to the rail, whereby the drill may be readily accommodated to the different sizes of rails commercially used, irrespective of variations both in Width and depth of the head of the rail.

My invention also contemplates a drill having; the characteristics set forth which is supported in operative drilling position against the rail, independently of the brouud.

in aicitiommy invention consists in the provision of a clamping device which will engage the rail at a pluraiity of points, the movable rail engaging parts being operated by a common operating means.

The foregoing, together with such other ob" Iits as may hereinafter appear or are incient to my invention, l attain by means an improved construction illustrated in neferred form in the accompanying drawings, wherein:

Vl?igure 1 is a vertical sectional view of a drill embodying my improvements, the

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ll being shown in operative drilling posii; Fig'. is a horizontal section taken on inc line livll of Fig. 1; 3 is a fragmentary section taken en the line lll-lll et Fig. l.

.Referring now to the drawings, the drill cifnipriscs a base frame 6 in which the spindle 3 with its bit 9 are mounted for rotative and folq longitudinal movement with reference to the rail 10a; an upper frame portion 10 extending,- upwardly from the base, in which is mounted the crank shaft 11 carryinfY the usual sprockets 12 and 13 and the crank 1d, the sprockets being operatively connected to the spindle by means of the drive 15 and 16 respectively engag- Speciieaton of Letters Patent.

Patented Apr, 26, 19231.

Serial No. 272,819.

ing the sprockets 17 and 13; and the clamping` device indicated as a whole at A.

ln so far as the drill proper is concerned, it will be sufficient to say that by the mechanism described, the drill 9 is simultaneously advanced and rotated in a manner Wellknown in this art.

Referring now to the clamping and drill supporting mechanism A, it will be seen that this device comprises a pair of complementary side frame members 19 having rearwardly extending arms 20, adapted to be bolted te the frame parts of the drill proper. Each side frame member is provided with a rectangular slot 2l, in each of which a bearing block 22 is slidably mounted, the position of the bearing blocks being adjusted by means of the wing screws 23 and lock nuts 2e. Rotatably mounted in the bearingblocks is a shaft 25, such shaft being provided with three eccentrics 26, 27 and 28, preferably formed integrally with the shaft. The shaft is rotated by means of the lever 29.

i second shaft 30 is also mounted in the side frame members in such manner that the dogs 3l, preferably formed integrally therewith, wili be ei'igaged by the eccentrics 26 and Qi", by means of which, when the shaft 5215 isrotated through the medium of the lever 29, the dogs 3l will be forced into tight engagement i, ith the lower near corner or the head. of the rail which is to be drilled, in the manner ilhistratod Fig. 1.

The side iframe members also have mounted therein a shaft 32 which carries a hook nember i3, the inner end of said hook memzer bein adapted to engage the eccentric 28 in such manner that when the shaft 25 is rotated in the direction of the arrow, the inner end of the hook B is elevated and the outer end is depressed. rlhe outer end of the hoek T carries a block 33, adjustment of which is effected by the Wing nut 34. rlfhe block 33 has a nose 35 engaging under the lower outer corner of the head of the rail, The downward and inward movement of the outer end of the hook imparted by the eccentric 23 brings the block 33 and nose 35 in position to tightly engage the lower far corner .of the head. i

ln applying the drill, the block 33 is r'st adjusted to suit the depth of head and the journals for the eccentric or cam shaft are ediuetcd to suit the width of the head. With the operating lever in the up position, the dogs 31 and the block 33 will be held by gravity in substantially vertical positions so that the side arm members of the drill may be readily placed on the rail, with the dogs and the block straddling the rail. rThe operating lever is now pushed downwardly to rotate the eccentric shait, simultaneously jamming the block 33 under the far lower corner of the head and the dogs 3l under the near lower corner. The axis of rotation oi the hook member is nearer the outer end of the hoolr so that normally when the 0perating lever is in up position the inner end will bring kthe outer end into a substantially vertical position by the action of gravity.

F rom the foregoing it will be seen that when the drill is positioned, the side frame members rest upon the top of the head, and the dogs 31 and block 33 engage the lower opposite corners of the head. Ilhe drill thus has a two point support on top and a three point support on the bottom of the head. The drill is, in this manner, firmly supported by the rail itself, independently of the. ground, for the drilling operation. lt will also be apparent that the clamping device will accommodate itsel'lto differences in width of head, by virtue of the fact that the axis of the shaft 25 can be quiclrll shifted by means of the wing screws 23. The dogs 31 are of such construction that they inherH ent-ly accommodate themselves to diiferences in depth or" head, while the adjustable mounting ot the block 33 is such that it may also be readily accommodated to dierences in depth of head.

I claim l. ln a rail drilling machine, the combina.- tion of a iframe, an outer rail gripping element pivoted to the frame, an inner rail gripping element pivoted to said frame, and a common means for operating said gripping elements, both of said elements being adapted to be held by gravity away from the rail when not operated on to grip the rail.

2. In a rail drilling machine, the combination orp a. frame, an outer rail gripping element pivoted to said frame, an inner rail gripping element pivoted to said Jframe, a shaft mounted in said frame, and eccentric means carried in said shaft for operating said rail gripping elements, both of said gripping elements beine maintained by gravity away from the rail when not operated on to grip the rail.

3. in a rail drilling machine, the combination of a frame, an inner rail gripping element pivoted to the frame, a pivotally mounted hook constituting an outer rail gripping element, camming members adapted to operate said rail gripping elements, and a shaft for operating said cams, the inner rail gripping element and the hook being maintained by gravity away from the rail when not operated on to grip the rail.

d. ln a rail drilling machine, the combination of a frame adapted to rest upon the rail, an outer rail gripping element pivoted on said frame above the rail and having an end extending inwardly across the rail, an inner rail gripping element pivoted on the frame, and a common means tor operating both of said gripping elements from the inside of the rail.

5. ln a rail drilling machine, the combination of a frame, outer rail gripping means pivotally mounted on the iframe, inner rail gripping means pivotally mounted on the trame and independent oi' said outer gripping means, and a common means for operating both of said gripping' means.

6. ln a rail drilling machine, the combination of a frame, outer rail gripping means pivotally mounted for swinging movement on said frame, inner rail gripping means pivotally mounted for swinging movement on said frame, and means for operating the grippinp` means, both of said gripping means being adaptedy to swing away from the rail when not operated on to grip the rail.

ln testimony whereof l have hereunto signed my name.

WALTER C. DYER. 

